The average monthly bill for wireless telephone subscribers from 1985 to 2008 can be modeled by B(x)=−1.442x+99.764, where x is the number of years after 1980. If this model remains valid, in what year will the average monthly bill be $43.53? The average monthly wireless phone bill would be $43.53 in the year ____.
Equations and Inequations
Equations and inequalities describe the relationship between two mathematical expressions.
Linear Functions
A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.
The average monthly bill for wireless telephone subscribers from 1985 to 2008 can be modeled by B(x)=−1.442x+99.764, where x is the number of years after 1980. If this model remains valid, in what year will the average monthly bill be $43.53?
The average monthly wireless phone bill would be $43.53 in the year ____.
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